public class Numbers
{
   /**
      Computes a sum of even integers 
      @param a the lower bound (may be odd or even)
      @param b the upper bound (may be odd or even)
      @return the sum of even integers between a and b (inclusive).
   */
   public int evenSum(int a, int b)
   {
      // your work here
      int sum = 0;
      for(int i = a;i <= b;i++){
         if(i % 2 == 0){
            sum += i;
         }
      }
   
      return sum; 
   }
}